Asian Journal of Bio Science

G. M. Parmar ¹, M. N. Kapadia ¹

Affiliations
1 Department of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

A laboratory trial was conducted to know the bio-efficacy of Verticillium lecanii and Beauveria bassiana alone and in combination with reduced dose of two insecticides against third nymphal stage of Lipaphis erysimi (Kalt.) at Junagadh Agricultural University, Junagadh during 2005-06. The results showed that the insecticides, imidacloprid 0.005 per cent and acephate 0.05 per cent alone were found most effective, while, application of V. lecanii at half concentration with either imidacloprid or acephate at half dose, i.e. 0.0025 or 0.025 per cent, respectively, was found as effective as synthetic insecticides alone against L. erysimi.

Keywords

Beauveria bassiana, Lipaphis erysimi, Synergistic, Verticillium lecanii.

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G. M. Parmar ¹, M. N. Kapadia ², N. B. Jadav ¹, V. J. Zizala ¹

Affiliations
1 Krishi Vigyan Kendra, Junagadh Agricultural University, Jamnagar (Gujarat), IN
2 Dept. of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

A field experiments was conducted to estimate the avoidable losses caused by Lipaphis erysimi in mustard sprayed with fungal biopestcides alone and in combination with synthetic insecticides. The percentage of avoidable yield losses in mustard seed were found varying from 11 to 68%. Acephate 0.05% recorded lowest yield loss of 11% followed by Verticillium lecanii @ 1.0 kg/ha+imidacloprid 0.0025 per cent (14%) and V. lecanii @ 1.0 kg/ha+acephate 0.025 per cent (20%). Higher avoidable loss (38 to 55%) observed in the treatment of V. lecanii @ 2.0 kg/ha, Beauveria bassiana @ 2.5 kg/ha and azadirachtin 0.000375%.

Keywords

Verticillium lecanii, Beauveria bassiana, Avoidable Losses, Lipaphis erysimi, Mustard.

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